is a bibliographic data frame obtained by the converting function convert2df.
It is a data matrix with cases corresponding to manuscripts and variables to Field Tag in the original SCOPUS and Clarivate Analytics WoS file.
fields
is a character vector. It indicates the fields to analyze using the standard WoS field tags.
Default is fields = c("AU","DE", "SO").
n
is a integer vector. It indicates how many items to plot, for each of the three fields.
Default is n = c(20, 20, 20)